Tilting device for drum melting furnaces



Oct. 11, 1938.

K. GOTTSCHALK TILTING DEVICE FOR DRUM MELTING FURNACES Filed Feb. 16,1938 Attorney Patented Oct. 11, 1938 ,FURNACES TILTING IlEVIGE Foe-DRUMMELTIhIGi.

I karl qottsclialk, cse Y -Application February 16,lasa'ser-ialim.191:,"196"v In Germany February 25,; I937.

' .2 Clai s. '-(01. 263-33) For quick charging and discharging, drummelting furnaces adapted to rotate about their longitudinal axis are, asisknown, tiltable about a transverse axis passingthrough the centre ofgravity of the furnace. tiltable frame carrying the furnace is'mountedeither by means of two toothed segments situated on both sides of thefurnace in bearing] frames located laterally of the furnace or by meansof cradlesmounted on the tiltable frame on both sides of the furnaceandcooperating with guide rollers. 7

Both tilting devices possess the disadvantage that they cover thefurnace laterally, more or less, and render the sides of the furnaceinaccessible, particularly when the furnace is constructed so as to beset in an absolutely vertical position for the purpose of ramming thelining, this construction being particularly very disadvantageous whenthe furnace is to be'provided with lateral devices for the introductionof air or fuel, or of reducing means for coal dust.

. To obviate this disadvantage, it has been proposed to lower thetilting devicesfto such an extent as to bring the tilting axis below thefurnace,

The new tilting device is characterized in that the furnace drum, bymeans of two toothed segments, mounted on both sides below the rotaryframe of the drum, rests on roller chains which are each passed over astationaryroller track having two guide drums and a toothed drivingwheel.

It has indeed already been proposed to employ roller chains forsupporting rotary drum furnaces, not for the purpose of tilting thedrum, however, but for the purpose of rotating the drum. In this devicethe roller chains did not serve simultaneously for driving the furnacebutQon the contrary, a specially provided crown gear was arranged.According to the invention, however, the roller chains servesimultaneously both as a supporting and as a driving means for thetilting movement, whereby, in View of the con- For this purpose, the

siderable masses which are to be moved, a very simple, durable andreliable tilting device is provided.

The drawing shows diagrammatically a constructional example of a rotarydrum melting furnace provided with the new tilting device.

Figure 1 is a. side view partly in section.

Figure 2 is an end view partly in section along the line 2--2 of Figure1, and

s Figure 3 is a side view on a smaller scale showing the drum set in anabsolutely vertical position for ramming the lining.

The tilting device comprises the stationary, hollow base frames a, a,each having a cylindrical roller track around which tracks are passedthe "endless link chains h, the link pins of which chains carry on theirouter ends-rollers i runningin the tracks a. The furnace drum d ismounted ina known manner on the tiltable support by means of track ringse, e supported on rollers I, and is held down loosely by bands g. Thetiltable support is provided on both its sides and below the drum withsprocket sectors b extended over an arc of substantially 120 and restingwith their periphery on. their chains, so that the sprocket sectors aremounted coaxially with the roller tracks. Each chain h is constructed asa double chain and the sprockets 7' of the sectors b project into thegap between the chains and engage the link pins of the chains. The linkchains are passed around guide drums k and driving wheels n, whichwheels are driven by a motor m.

By rotation of the driving wheels in the direction of the arrow 4), thechains h and the sprocket sectors b are moved in the direction of thearrow q through the bearing bed formed by the roller tracks a, the drumthus being tilted. Despite the fact that the sprocket sectors b embracean arc of 120 and the tilting axis 0 is in the centre of gravity of thefurnace, the entire tilting device is situated below the drum, so thatthe latter remains quite freely accessible from both sides.

O F E J As will be seen in Figure 3, the drum may be set perfectlyvertical for the purpose of ramming the lining, the drum then beingsupported on either side by struts v which engage at their one end thespindle r of the guide rollers k and at their other end a pivot ssituated on a bracket t inserted between the track rings e of the drum.Tilting may beefiected in both directions and until the verticalposition is reached.

What I claim is:

1. A drum melting furnace device including in combinationa furnace drum,means for rotating said drum about its longitudinal axis, a tiltablesupport, means for mounting said drum and' said rotating means on saidtiltable support, two sta- V tionary hollow base frames associated withsaid support,-one frame on either side of said supporteach 'of said baseframes being provided with a cylindricalljr-shaped track at its uppersurface and a roller chain adapted to ride upon said track jand to pass'the hollow space of said base frame; a common drive for the rollerchains ofi iboth said base frames, said tiltable support beingprovided'with two sprocket sectors, one at either side, said sectorsbeing extended downwardly from said support vand below said drum, eachof said sprocket sectors being co-axial and inalignment withflone ofsaid base frame tracks and adaptedto be; supported and to be engaged bythe upper branch of the roller chain ridin upon said'track. g

'2. A device as set forth in claim 1, said rotating means including apair of peripheric track rings fast on said drum, and roller pairsassociated with'said track rings and adapted to support and to rotatesame, said device further including 5 two struts and two brackets, oneof each on either side of said support, a spindle mounted oneitherbaseframe, said brackets being inserted between;

' said track rings at either side of said drum'each,

said brackets being provided each with a pin pro- 10 by means of saidstrutsthe upright position of 15 said drum. 7

KARL GOTTSCHALK.

